From w3c >>
The sequence <FOO /> can be interpreted in at least two different ways, depending on the DOCTYPE of the document. For HTML 4.01 Strict, the '/' terminates the tag <FOO (with an implied '>'). However, since many browsers don't interpret it this way, even in the presence of an HTML 4.01 Strict DOCTYPE, it is best to avoid it completely in pure HTML documents and reserve its use solely for those written in XHTML.

About Cheatography

10th JuneOn The Blog

5 Ways Cheatography Benefits Your BusinessCheatography Cheat Sheets are a great timesaver for individuals - coders, gardeners, musicians, everybody! But businesses can benefit from them as well - read on to find out more.